The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 07, 2010
Filed:
Oct. 25, 2005
Cornelis Adrianus Maria Vijverberg, Halsteren, NL;
Martin Bosma, Arnhem, NL;
Johannes Wilhelmus Maria Schellekens, Arnhem, NL;
Freddy Gerhard Hendrikus Van Wijk, Dieren, NL;
Cornelis Adrianus Maria Vijverberg, Halsteren, NL;
Martin Bosma, Arnhem, NL;
Johannes Wilhelmus Maria Schellekens, Arnhem, NL;
Freddy Gerhard Hendrikus Van Wijk, Dieren, NL;
Nuplex Resins B.V., Bergen Op Zoom, NL;
Abstract
The invention relates to a high gloss car wash-resistant coating composition comprising an epoxy-functional binder and a cross-linker reactive with the epoxy groups of the binder and a method to prepare such a car wash-resistant coating. The invention further relates to the use of said coating composition, as a pigment-free top coat or a clear coat, in the finishing and refinishing of articles, for example motorcycles, cars, trains, buses, trucks, and aeroplanes. The coating composition after curing forms a coating having an initial gloss of at least 81 GU and a loss of gloss (LoG) of less than 0.25, the loss of gloss being determined by the formula (I)LoG =(1−/(1+)+(1−e)  (I)wherein K=B*(Tg−C) In formula I A=−8.03, B=−0.21, C=328 and D=−0.00304. X reflects the cross-link density parameter in kPa/K, Tgthe onset temperature of the Tg transition in K and ΔTg the width of the glass transition temperature in K, all three parameters determined in a dynamic mechanical thermal analysis test (hereinafter 'DMTA') at 11 Hz and a heating rate of 5° C./min.